/[gentoo-x86]/eclass/flag-o-matic.eclass
Gentoo

Diff of /eclass/flag-o-matic.eclass

Parent Directory Parent Directory | Revision Log Revision Log | View Patch Patch

Revision 1.3 Revision 1.60
1# Copyright 1999-2002 Gentoo Technologies, Inc. 1# Copyright 1999-2004 Gentoo Foundation
2# Distributed under the terms of the GNU General Public License v2 2# Distributed under the terms of the GNU General Public License v2
3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.60 2004/06/25 00:39:48 vapier Exp $
4#
3# Author Bart Verwilst <verwilst@gentoo.org> 5# Author Bart Verwilst <verwilst@gentoo.org>
4# /space/gentoo/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass 6
5ECLASS=flag-o-matic 7ECLASS=flag-o-matic
8INHERITED="$INHERITED $ECLASS"
9IUSE="$IUSE debug"
6 10
7# 11#
8#### filter-flags <flag> #### 12#### filter-flags <flags> ####
9# Remove particular flags from C[XX]FLAGS 13# Remove particular flags from C[XX]FLAGS
14# Matches only complete flags
10# 15#
11#### append-flags <flag> #### 16#### append-flags <flags> ####
12# Add extra flags to your current C[XX]FLAGS 17# Add extra flags to your current C[XX]FLAGS
13# 18#
14#### change-flags <orig.flag> <new.flag> ### 19#### replace-flags <orig.flag> <new.flag> ###
15# Replace a flag by another one 20# Replace a flag by another one
16# 21#
22#### replace-cpu-flags <new.cpu> <old.cpus> ###
23# Replace march/mcpu flags that specify <old.cpus>
24# with flags that specify <new.cpu>
25#
26#### is-flag <flag> ####
27# Returns "true" if flag is set in C[XX]FLAGS
28# Matches only complete a flag
29#
30#### strip-flags ####
31# Strip C[XX]FLAGS of everything except known
32# good options.
33#
34#### strip-unsupported-flags ####
35# Strip C[XX]FLAGS of any flags not supported by
36# installed version of gcc
37#
38#### get-flag <flag> ####
39# Find and echo the value for a particular flag
40#
41#### replace-sparc64-flags ####
42# Sets mcpu to v8 and uses the original value
43# as mtune if none specified.
44#
45#### filter-mfpmath <math types> ####
46# Remove specified math types from the fpmath specification
47# If the user has -mfpmath=sse,386, running `filter-mfpmath sse`
48# will leave the user with -mfpmath=386
49#
50#### append-ldflags ####
51# Add extra flags to your current LDFLAGS
52#
53#### filter-ldflags <flags> ####
54# Remove particular flags from LDFLAGS
55# Matches only complete flags
56#
57#### etexec-flags ####
58# hooked function for hardened gcc that appends
59# -fno-pic to {C,CXX,LD}FLAGS
60# when a package is filtering -fpic, -fPIC, -fpie, -fPIE
61#
62#### fstack-flags ####
63# hooked function for hardened gcc that appends
64# -fno-stack-protector to {C,CXX,LD}FLAGS
65# when a package is filtering -fstack-protector, -fstack-protector-all
66# notice: modern automatic specs files will also suppress -fstack-protector-all
67# when only -fno-stack-protector is given
68#
17 69
70# C[XX]FLAGS that we allow in strip-flags
71setup-allowed-flags() {
72 if [ -z "${ALLOWED_FLAGS}" ] ; then
73 export ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -fno-unit-at-a-time -pipe -g"
74 case "${ARCH}" in
75 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mabi" ;;
76 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC -m64" ;;
77 x86) ALLOWED_FLAGS="${ALLOWED_FLAGS} -m32" ;;
78 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
79 ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
80 esac
81 fi
18 82
83 # C[XX]FLAGS that we are think is ok, but needs testing
84 # NOTE: currently -Os have issues with gcc3 and K6* arch's
85 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays"
86 return 0
87}
88
19filter-flags () { 89filter-flags() {
90 local x
20 91
21 for x in $1; do 92 for x in "$@" ; do
93 case "${x}" in
94 -fPIC|-fpic|-fPIE|-fpie|-pie) etexec-flags;;
95 -fstack-protector|-fstack-protector-all) fstack-flags;;
96 *) ;;
97 esac
98 done
99
100 # we do this fancy spacing stuff so as to not filter
101 # out part of a flag ... we want flag atoms ! :D
102 CFLAGS=" ${CFLAGS} "
103 CXXFLAGS=" ${CXXFLAGS} "
104 for x in "$@" ; do
22 CFLAGS="${CFLAGS/$x}" 105 CFLAGS="${CFLAGS// ${x} / }"
23 CXXFLAGS="${CXXFLAGS/$x}" 106 CXXFLAGS="${CXXFLAGS// ${x} / }"
24 done 107 done
25 108 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}"
109 CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}"
110 export CFLAGS CXXFLAGS
111 return 0
26} 112}
27 113
114filter-lfs-flags() {
115 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
116}
117
118append-lfs-flags() {
119 append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
120}
121
28append-flags () { 122append-flags() {
123 export CFLAGS="${CFLAGS} $*"
124 export CXXFLAGS="${CXXFLAGS} $*"
125 [ -n "`is-flag -fno-stack-protector`" -o \
126 -n "`is-flag -fno-stack-protector-all`" ] && fstack-flags
127 return 0
128}
29 129
30 130replace-flags() {
131 # we do this fancy spacing stuff so as to not filter
132 # out part of a flag ... we want flag atoms ! :D
31 CFLAGS="$CFLAGS $1" 133 CFLAGS=" ${CFLAGS} "
32 CXXFLAGS="$CXXFLAGS $1" 134 CXXFLAGS=" ${CXXFLAGS} "
33
34}
35
36change-flags () {
37
38 CFLAGS="${CFLAGS/${1}/${2}" 135 CFLAGS="${CFLAGS// ${1} / ${2} }"
39 CXXFLAGS="${CXXFLAGS/${1}/${2}" 136 CXXFLAGS="${CXXFLAGS// ${1} / ${2} }"
40 137 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}"
138 CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}"
139 export CFLAGS CXXFLAGS
140 return 0
41} 141}
142
143replace-cpu-flags() {
144 local oldcpu newcpu="$1" ; shift
145 for oldcpu in "$@" ; do
146 replace-flags -march=${oldcpu} -march=${newcpu}
147 replace-flags -mcpu=${oldcpu} -mcpu=${newcpu}
148 replace-flags -mtune=${oldcpu} -mtune=${newcpu}
149 done
150 return 0
151}
152
153is-flag() {
154 local x
155
156 for x in ${CFLAGS} ${CXXFLAGS} ; do
157 if [ "${x}" == "$1" ] ; then
158 echo true
159 return 0
160 fi
161 done
162 return 1
163}
164
165filter-mfpmath() {
166 local orig_mfpmath new_math prune_math
167
168 # save the original -mfpmath flag
169 orig_mfpmath="`get-flag -mfpmath`"
170 # get the value of the current -mfpmath flag
171 new_math=" `get-flag mfpmath | tr , ' '` "
172 # figure out which math values are to be removed
173 prune_math=""
174 for prune_math in "$@" ; do
175 new_math="${new_math/ ${prune_math} / }"
176 done
177 new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`"
178
179 if [ -z "${new_math}" ] ; then
180 # if we're removing all user specified math values are
181 # slated for removal, then we just filter the flag
182 filter-flags ${orig_mfpmath}
183 else
184 # if we only want to filter some of the user specified
185 # math values, then we replace the current flag
186 replace-flags ${orig_mfpmath} -mfpmath=${new_math}
187 fi
188 return 0
189}
190
191strip-flags() {
192 local x y flag NEW_CFLAGS NEW_CXXFLAGS
193
194 setup-allowed-flags
195
196 local NEW_CFLAGS=""
197 local NEW_CXXFLAGS=""
198
199 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
200 if has ~${ARCH} ${ACCEPT_KEYWORDS} ; then
201 use debug && einfo "Enabling the use of some unstable flags"
202 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
203 fi
204
205 set -f # disable pathname expansion
206
207 for x in ${CFLAGS}; do
208 for y in ${ALLOWED_FLAGS}; do
209 flag=${x%%=*}
210 if [ "${flag%%${y}}" = "" ]; then
211 NEW_CFLAGS="${NEW_CFLAGS} ${x}"
212 break
213 fi
214 done
215 done
216
217 for x in ${CXXFLAGS}; do
218 for y in ${ALLOWED_FLAGS}; do
219 flag=${x%%=*}
220 if [ "${flag%%${y}}" = "" ]; then
221 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
222 break
223 fi
224 done
225 done
226
227 # In case we filtered out all optimization flags fallback to -O2
228 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then
229 NEW_CFLAGS="${NEW_CFLAGS} -O2"
230 fi
231 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
232 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
233 fi
234
235 set +f # re-enable pathname expansion
236
237 export CFLAGS="${NEW_CFLAGS}"
238 export CXXFLAGS="${NEW_CXXFLAGS}"
239 return 0
240}
241
242test_flag() {
243 local cc=${CC:-gcc} ; cc=${cc%% *}
244 if ${cc} -S -xc "$@" -o /dev/null /dev/null &>/dev/null; then
245 printf "%s\n" "$*"
246 return 0
247 fi
248 return 1
249}
250
251test_version_info() {
252 local cc=${CC:-gcc} ; cc=${cc%% *}
253 if [[ $(${cc} --version 2>&1) == *$1* ]]; then
254 return 0
255 else
256 return 1
257 fi
258}
259
260strip-unsupported-flags() {
261 local NEW_CFLAGS NEW_CXXFLAGS
262
263 for x in ${CFLAGS} ; do
264 NEW_CFLAGS="${NEW_CFLAGS} `test_flag ${x}`"
265 done
266 for x in ${CXXFLAGS} ; do
267 NEW_CXXFLAGS="${NEW_CXXFLAGS} `test_flag ${x}`"
268 done
269
270 export CFLAGS="${NEW_CFLAGS}"
271 export CXXFLAGS="${NEW_CXXFLAGS}"
272}
273
274get-flag() {
275 local f findflag="$1"
276
277 # this code looks a little flaky but seems to work for
278 # everything we want ...
279 # for example, if CFLAGS="-march=i686":
280 # `get-flag -march` == "-march=i686"
281 # `get-flag march` == "i686"
282 for f in ${CFLAGS} ${CXXFLAGS} ; do
283 if [ "${f/${findflag}}" != "${f}" ] ; then
284 printf "%s\n" "${f/-${findflag}=}"
285 return 0
286 fi
287 done
288 return 1
289}
290
291has_hardened() {
292 test_version_info Hardened
293 return $?
294}
295
296has_pic() {
297 [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0
298 [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0
299 test_version_info pie && return 0
300 return 1
301}
302
303has_pie() {
304 [ "${CFLAGS/-fPIE}" != "${CFLAGS}" ] && return 0
305 [ "${CFLAGS/-fpie}" != "${CFLAGS}" ] && return 0
306 test_version_info pie && return 0
307 return 1
308}
309
310has_ssp() {
311 [ "${CFLAGS/-fstack-protector}" != "${CFLAGS}" ] && return 0
312 test_version_info ssp && return 0
313 return 1
314}
315
316has_m64() {
317 test_flag -m64
318 return $?
319}
320
321has_m32() {
322 test_flag -m32
323 return $?
324}
325
326replace-sparc64-flags() {
327 local SPARC64_CPUS="ultrasparc v9"
328
329 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
330 for x in ${SPARC64_CPUS}; do
331 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
332 done
333 else
334 for x in ${SPARC64_CPUS}; do
335 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
336 done
337 fi
338
339 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
340 for x in ${SPARC64_CPUS}; do
341 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
342 done
343 else
344 for x in ${SPARC64_CPUS}; do
345 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
346 done
347 fi
348
349 export CFLAGS CXXFLAGS
350}
351
352append-ldflags() {
353 export LDFLAGS="${LDFLAGS} $*"
354 return 0
355}
356
357filter-ldflags() {
358 local x
359
360 # we do this fancy spacing stuff so as to not filter
361 # out part of a flag ... we want flag atoms ! :D
362 LDFLAGS=" ${LDFLAGS} "
363 for x in "$@" ; do
364 LDFLAGS="${LDFLAGS// ${x} / }"
365 done
366 LDFLAGS="${LDFLAGS:1:${#LDFLAGS}-2}"
367 export LDFLAGS
368 return 0
369}
370
371etexec-flags() {
372 # if you're not using a hardened compiler you wont need this
373 # PIC/no-pic kludge in the first place.
374 has_hardened || return 0
375
376 if has_pie || has_pic; then
377 [ -z "`is-flag -fno-pic`" ] &&
378 export CFLAGS="${CFLAGS} `test_flag -fno-pic`"
379 [ -z "`is-flag -nopie`" ] &&
380 export CFLAGS="${CFLAGS} `test_flag -nopie`"
381 fi
382 return 0
383}
384
385fstack-flags() {
386 if has_ssp; then
387 [ -z "`is-flag -fno-stack-protector`" ] &&
388 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`"
389 fi
390 return 0
391}

Legend:
Removed from v.1.3  
changed lines
  Added in v.1.60

  ViewVC Help
Powered by ViewVC 1.1.20